I upgraded to infinity about 2 months ago from BT Broadband.
I run the tests and the Upload speed and download speeds are greatly improved.
But when watching iPlayer there remains quite a bit of buffering and we get the message insufficient band width.
Also some of the wireless connections are slow to stream - to my ipad for example
Is there anything that I can do to improve this
Lots of help on wireless issues at http://forumhelp.dyndns.info/wireless/wirelessmenu.html
Also for wireless, install (free on PC) inSSIDer and check out details of signal and channels.
Also, it can help with siting the HomeHub and the devices as you can see good/bad positions for signal.
Quite often it is best to choose a specific channel rather than let the HomeHub do its automatic jumping.
Check the iPlayer diagnostics to see what they say. http://www.bbc.co.uk/iplayer/diagnostics
But some posters have found that the diatgnostics show very good speeds but they still get bad streaming.
Not sure if anyone has found a solution to that version of the problem.